[R] COnfidence intervals for estimates of linear model

[ONKELINX, Thierry]

Dear Daniel,

Have a look at ?predict.lm The interval argument gives you the
information that you need.

HTH,

Thierry 


------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen
Belgium

Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium

tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be
www.inbo.be

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~ Sir Ronald Aylmer Fisher

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~ Roger Brinner

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ensure that a reasonable answer can be extracted from a given body of
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~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
Namens Daniel Brewer
Verzonden: woensdag 23 december 2009 11:28
Aan: r-help at stat.math.ethz.ch
Onderwerp: [R] COnfidence intervals for estimates of linear model

Hello,

I would like to calculate the 95% confidence intervals for the estimates
of a linear model and I just wanted to check that I am doing it correct.
 Is it just:

Estimate + 1.95996*Std.Error to Estimate - 1.95996*Std.Error

or is there another approach that doesn't assume a normal distrbution?

Thanks.  Apologies for my naiivity

Dan

--
**************************************************************
Daniel Brewer, Ph.D.

Institute of Cancer Research
Molecular Carcinogenesis
Email: daniel.brewer at icr.ac.uk
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